Can-testing machine



April 27, 1926.

- 1,582,216v G. w. HEpsTRoM CAN TESTING MACHINE Filed lawn 28, 1925 5LSheets-Sheet 1 zo K G. W. HEDSTROM CAN TESTING MACHINE Filed Mar'ch 281925 5 Sheets-Sheet 2 April 27 ,.1926.

April v27, 192e. 1,582,216

G. W. HEDSTROM CAN TESTING MACHINE 5 Sheds-Sheet 3 Filed March 28 1925April 27 1926. 1,582,216

G. w. Hr-:Ds'rRoM 1 1 CAN TESTING MACHINE Y Filed March 28, 1925shets-sheet 4 1@ v 1 1 N ,j Al

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. `MFM7MW i April 27, 192e. 1,582,216

G. W-. HEDSTROM 01m TESTING MACHINE Filed March 28, 1925 5 Sheets-Sheet5 Patented pr. 27, 1926.

GUs'rAv W. HEDSTROM, or CHICAGO, yILLINOIS,iissieiron or oivn-I-ranr To:enrnn VW. F'ULFORD, or CHICAGO, ILLINOIS; OLGA n. D.- sain GUs'rAv W.Hnnsrnoivi, nncnnsnn.`

nnnsrnoia anMINIsfrnAr'niX or CAN-TESTING Y MACHINE.

Application filed March 28,1925. Serial No. 18,947.

To all fwzomt't may concern.'

Beit known thatl, GUSTAV lV. HiiDs'rRoM, acitizen ofthe United States,and a resident of Chicago, in thecounty of Cook and State of Illinois,have invented certain new and useful Improvements in Can-Testing Ma.-chines; and l doV hereby declare that the following is a full, clear,and exact description thereof, referencebeing had. to the `accompanyingdrawings and to the characters of reference. marked thereon, Which formVa pantof Vthis specification. v

rlhisy invention relates `to a novel machine for testing can bodies todetect leaks, either through the material of the can body or throughjoints which connect the can body parts, andthe invention refers moreparticularly to a machine' for so testing. cans under theifacuunitesting method. t

The machine herein shown embodying` my invention embraces, incombination With an extended track for the passage of can body carriers,preferably arranged as inclined fractional stretches or lengths joinedin con tiniious to-and-fro relation, a Acombined assembling andvacuumizingmechanism aft` which the can bodies are assembled inairtightor sealed relation on the carriers and at which air is Withdrawnfrom the sealed can bodiesrivhere'by perfect can bodies Will be causedto 4adhere to the carriers throughout the passage of the carriersthrough the machine by eXternal air pressure, and whereby defective canbodies will be caused to drop off the carriers by reason of leakage ofair thereinto,V resulting in an equaliziiig of air pres-- sure withinand Without the defective can bodies. The perfect can bodies willbecarried through the length of the carrier track or support to a pointwherethey are detached from the heads, either mechanically'or byadmission of air .thereinto1 While the cans which are not air-tight willdrop oit their carriers atY different points in the travel of thccarriers upon leakage of air thereinto.

The'rcarriers are causedfto travif'el continu-` tinuously travelalongtrack-ivays until iey leased from the carriersr by leakage of airVinto thebodies, `orwuntil the perieet cans reach the releasing stationand are there dropped off into a suitable discharge chute, the carrierscontinuing'their travel through and past the assembling and vacuumizingmechanism to receive and vacuumize other can bodies fed to saidmechanism. The machine is, therefore, continuousin operation andthe canbodies are automatically assembled on the carriers andare automat# callyreleased therefrom.

Among thel objects of the invention is vto Vproduce a machine for thispurpose which is bodiesv ina relatively compact' space.

Another object of the invention is to produce a `machine foreiicieutly,testing can bodies having minute or sion7 leaks, Which.

`duce `an improved machine into which the can Vbodies are successivelyfed and by which they areautoinatically assembled oncarriers capa-bleefhandling a large number of can,`

and sealed, to be progressively vacuumized and thereafter caused to'passslowly through then machine until the perfect can bodies are i fully.tested or the imperfect 'bodies drop aivay from the ca 1riers. y

Another object of theiinvention is to provide a novel mechanism forassembling can bodies and vacuiiinizing them, so constructed as toquickly, efficiently and economically reduce the pressure in the bodiesto a prede termined low pressure before they begin to travel'through thepathrprovidcd therefor in the machine. 1 V Another obiect of theinvention is to pro` ,90 duce a novel` combined cairieiand canbodysealing device, vhi'ch serves the doublev purpose of controlling the`vacuuinizing method and for carrying the can bodies .through the ymachine.

1 Another object of the inventioiiis to produce, in amachine of. thischaracter, a novel to-and-fro track for the ,can body carriers. so

arranged that when the carriers are deliifeied with the central openingof the carrier, whicliis adapted for Vengagement with and controlled bya spring-closed, cone valve 36', whose tubular stem 37 extends throughthe central opening 15 of the carrier. The vacuum control valve is aVcombined cone and disc valve, it being formed inwardly beyond the coneportion with a radially enlarged, hat, disc-like ila-nge 362 which isadapted to bear flat .against the inner face of the sealing disc whenthe valve is closed, as best shown inv Figure 5. v

' The tubular valve stem 37 is formed just exterior to the cone valve 36with radial ports to establish communication between saidtubular stemandthe can body when the valve 36 is in open position. Said tubularvalve stem 37 extends outwardly into and is ixed rigidly in alnipple 39which is slidingly fitted in the enlarged outer end of the carrieropening 15. A valve seating spring 41 surrounds said tubular Valvestemaiid is interposed between ashoul'der in the central bore 15 of thecarrier and the inner end of said nipple 39, said spring opi erating byexpansion to seat said valve.

The outer face of each carrier is formed with a central bo-ss 42 havinga beveled periphery, over which is adapted to `lit the internal conedface of a sealing cup 43 that surrounds and is fitted to the inner endoi an exhaust tube 44, through which air is drawn from the can bodies.ASaid sealingcup is backed by a metal plate 45 that is rigidly fixed inany suitable'maiiner to said exhaust tube. The exhaust tube 44 isaxially displaceable and is adapted tor engagementV at its inner end,within the sealing cup 43, with the nipple 39 for the purpose ofopening` the valve 36 against the action of its sealing spring 41 toestablish coniinunication of the' exhaust tube with the interior of acan.

There are a number of said exhaust tubes 44, which are aiigularlydisposed about the shaft 25, before referredto, and said tubes 44 areslidingly supported in aligned openings in pairs of arms 48 ot' a spider49that is keyed on the said countershaft 25. Springs 50 are interposedbetween the inner spider arms' 48 and shoulders 51 on the exhaust tubes44 and serve normally to hold said tubes outwardly away iii'oin thecar-v riers, as best shown in Figure 5; but permit said tubes to beforced inwardly, with the sealing cups 43 engaged with the bosses 42,and with the inner ends of the said tubes engaged with the nipples 39 toopen the exhaust valves againstithe compression ot' their seatingsprings.

The said exhaust tubes 4.4,.by reason ot their connect-ion to the spider49, are/caused to continuously revolve in a circular path, concentric tothe axis of rotation of the countershaft The said tubes are axiallyshifted while passing through a short arc of their movement through thecoaction of rollers 52 thereon with a stationary cam 53 earried by anadjacent countershatt supporting standard 26. Upon movement of eachexhaust tube inwardly by said cam, the inner end of the tube strikes thevalve opening nipple 39 just after the sealing cup has been somewhatcompressed o-n the boss 42, so that when the said valve 3G is open, thescaling cup 43 will prevent leakage or air to the .n

between nipples 55 in communication with the exhaust tube bores andother nipples 56' that communicate' with aiigularly spaced ports 57 ot aflanged distributing collar 5S which surrounds and rotates with thecountershaiit 25 and is axially movable thereon. The porteditace otsaiddistributing collar is flat to bear with a close iit against the I.Vinner `iiat tace oct'a fixed, single ported member 59 that is attachedin any suitablek manner to the adj ace-nt standard. The port 59 or saidmember 59 is successively brought to register with the ports 57 throughrotation of the distributing collar. The single port 59 is connectedthrough a vacuum pipe GO to any suitable space of low pressure..

A spring 61 surrounds a sleeve 62 of the distributing collar 53, beinginterposed between tlie hub ot the spider49 and the said collar. Saidspring maintains vthe ported face of the distributing collar pressedagainst the single ported ace ol the member 59, and automaticallycompensates for wear between said faces.` The means 'orallowing axialdisplacement ot the distributing collar 58 on the countersliatt 25,through the action ofthe spring 61,fcoinprise a pin G3 that extendsthrough said shaft and engages `Yinwardly opening diaii'ietric slots64in the slee-Ve extension G2 oi said collar 58,-as best shown in Figures5 and 7.

The mechanism for assembling the can bodies on the carrier 15,piejliaratory to vacuuniiziiig said bodies, by the means described,isinade as follows:

The feed-way Q0 directs the can bodies into the angularly spaced,peripheral pockvets 6T of a spider 63 which is fixed and roof a spiderTQ) vfixed tothe eonntershatt and disp'osedbetween theea-n 'body spiderGS and the litter. belt sprocket: wheel 2li, be'l'ore referred to; Theupper tra/elrbar 'ot the chute 3a terminates lshort of the peripheryofthe carrier handling' sp1der'70,"-butthe lower track bar otsaidchute`continues as a curved extension T1 around: the vasseinbling andvac-nulnizing mechanism to guidingly engage vthe peripheral 'grooves 'otthe carriers to thereby :guide them tlnonghsaid mechanisms. rihe curvedguide bar 71'merges-intov the 'outermost guide'or track barr 3l, wlnclrcooperates with-the mating.- inner track or guide bar to guide thecarriers anrdvthe pro-l jecting, attached can4 bodies upwardly. itwillthus'be seen tliattli'e pockets GT an'd), to respectively receivevthe can bodies and carriers, are equally angnlarly. spaced about' theaxis of the lcountershaft -andf are always axially iii'line with 'eac-liother land with the axes 'of' t-he exhaust tubes 4i;

The `can bodies `so ldelivered to the pockets of the spider-"68arefendwise moved `tofbe rassembledV with their `'open vends yagainstthe sealing.y discs 35i-ot. thev carrier 15 by means of afseries ofangularily spaced plungers f whiohhare carried by and slidablei1i-angu-- lari-y spaced gui-deopenings `ot -a spider 76 'that iskey-'ed or otherwise-made fast- 2m-the` Countersha-t 25 to turntherewith.- The angular szpacmgfol' saidplungers brings them in axialvalignment withthe Ican bod-ies, the

carri-eis and the 'exhaust tubes 44E. Said plungers are; tor-med ontheirl ym-n-er ends with discs 77 to engage the closed ends oi thecranbodies, and are normally spr-ing-- held away from the ca-nv bodiesvby spiral,

expansion spring 7S surrounding:r the plung,``

ers-between the outer face otthe spider 76 andthe rounded'hoads 79-on-the plungers. The plungers are ladapted to be pressed 1nwardly atthe proper period during rotationl of 'the spider 76, and also'thespiders G8, 70

a-ndfiia, against theclosed can body endsthroi-,igluthe action ot astationary cam -80 that is supported on a. standard Sl ixedto thebase 9,just inside the adjacent bearing standard 26. Said Cain-80 is loppositeto the stationary cam 53 which actuates the sli/ding exhaust tubes elet,so thatascan body asse-mbling disc 77 is moved inwardly to seat theopenendot a can body against ythe sealing disc 35 at the. Sametime aancomsinofex-- tube and the interior 'of thecan-body -S'uiieiently toreduce air pressure within the cank body to'cafuse rtheean body to beheldin -'overhanging attachment to the #carrier ini the' ized to therequiredextent7 they are held'on the `carrie-rs by externallairpressure, and the carriers :arecaus'ed tetra-vel aroundthe'as semblingrrand vacuumizin'g mechanism until the carriers and vthe attavolied'foanbodies are properly delivered intofthe'vertical chute 'or tracliwayformed between the 'guider -or traeflr bars 31. Said carri-ersandattachedk can bodies arev thusc'aused' to* travel over the curved trackextension 7.1 by. thev sprocket chain vl'ugs-QQand the interlock of the=car riers with the revolving `pockets 69.5 and the carriers reina-ininthe infiuence 'of said ings 22 andi are tlrerebyfdelivered totlheupper end of the vertical traclvway formed be# tweenthe track `orguide barsl, from the upper end of whichf'said carriers yand the tacliedcan bodies are delivered through x the track-Way r33 to tlre--trackw-ayAformed between tlie upper and* lower track bars 1G and 17..Tliereatter'the carrie-rs rollvdown the't-raclr-ways by :gravityuntil'they 'reach the discharge or 4release station A2;

At the ldischarge or release station A2 there is arranged a stationary'valve opening,` cambar l83 which is :tix-ed to the Atia-ck vstructureyin anyfsuitable manner to openA the Valves l36 as the carri-ers passsaid-- station and thereby permit inter-nal and external equalizationofI air pressure Aon the can'bodies, whereby they drop-by gravi-ty lto-asuit.'- able place of disposal for said bodies. As

herein shown;Y the vcam bar S3 is provided` withfan'intermediate raisedporti-on 84 and with ascending. and descending` cam porti-ons 85, 86,respectively. Saidcam bar isloca-ted in a straight porti-on of the.-track-way, parallel to the path Eot movement oftv the vent nipples 37,as best shownfin- Figure land in suoli position fth-at the vascendingcara portion servos7 -by contact with said nipples, to open-thevacnunrcontrolling valves; The intermediate straight portion 84 y'ot thecam'jbar serves to hold Isaid* valves open a suiiici-ent length ofti-meto equalize air pressure onftlie inner and outer sides voit thecanbodies, whereupon-the perfect can bodies will dropby gravity into the'receiving end 87 of a downwardly and rearwardly inclined dischargechut-e 88.

The defective can bodies dropby gravity away from the carriers duringthe travel of the latter throughthe track system, by reason of leakageot air into such detective can Cil.

bodies having very minute kleaks will `be automatically detected andallowed to drop away from their carriers before they reacn ltheautomatic valve opening device at the release station A2.

It will be observed that a machine embodying my invention hasY ehicientcapacity for testing ay large number of cans, inasmuch as the carriers,when delivered to the, system of inclined track-ways, roll down saidtrackways in closely spaced relation. It will also be observed that thetotal length of the track-way, with moderate speed of travel of thecarriers 'and can bodies through the machine, gives ample time fordetecting detective cans, notwithstandiiigr that the leaks be so smallas to be otherwise non-detect able. A -further advantage of the machineshown is that the can bodies can be delivered to andVdischargedfrom themachine `position on thev carriers until the defective can bodies dropoii the carriers, or until they are released at the releasing stationA2.

The can body and carrier assembling mechanism and vacuumizing mechanismare constructed and arranged to be exceedingly compact, and by reason ofthe fact that the elements of these various mechanisms are carried byand rotate with the countershatt 25, it is assured that the assemblingand evacuating or vacuumizing mechanism will always be maintained inalignment, liabil-l ity of lost motionoit the aligned parts ybeingnegligible. TheV location and interaction oiI the assembling landvacuun'iizing mechanisms at one station contributes Tto the furtheradvantage ofsimplifying the mechanism and reducing powernecessary'toctiiciently drive said mechanism. f Y

The lowermost 'section of the track-way,

as shown in Figures 1 and 3, is provided with a normally closed inletand outlet opening through whichthe carriers can be inserted into orremoved from the trackfwayi This is effected by interrupting the uppertrack bar i6 adjacent to the release station A2 toproduce an opening ofa length to permit the carrier to'be passed therethrough, and closingthe said ropening by a closure bar 90 of a cross section to correspondwith the track bar 16. Said bar is herein shown as hinged at one end bya pin 91to'the upper track structure, and is provided at its other endwith an oiiset lip 92 which rests on the upper edge of the broken awaytrack bar 16. Said hinge closure may be locked in place by a set screw93 extending through said lip and into the subjacentytrack bar.

Whilel the sealing disc 35 is shown as adapted to a flanged open end canbody, itis obvious however that said sealing disc may be adapted. to anycan body having one closed end and having any kind of an opening at itsother end through which air may be exhausted to hold the can body sealedagainst said disc". Such necessary `changes as may be` required to adaptthe disc to other kinds of open ended cans fall within the scope of theappended claims. So also the said carrier provided or faced with'thesealing disc, which latter has a valve seat through which air passesfrom or into the can body ortesting purposes, may be employed in apressuretesting machine1 without departure from kthe spirit of theinvention recited in the appended claims.

I claim: s

l. A'machine for testing can bodies comprising'a. to-and-iro track-wayfor can body carriers, with adjacent stretches disposed at an anglerelatively to each other in the direction of travel of the carriersthereupon, said stretchesbeing'united at their ends to constitute acontinuous track-way.`

2. A machine for testing can bodies com-fA prising guide bars formingato-andi`ro track-way for can body carriers, with'adja-r cent stretchesdisposed at an angle relative-k ly to each other Yinf the direction oftravel of the carriers thereupon, said stretches being united attheirends to constitute a continuous track-way, said guide bars beingdisposed in the samey vertical plane tok constitute guidesiorperipherally grooved can body carriers. K' o y 3. Aj machine for testingcanbodies comprising a track-way for can body carriersl formed between*a plurality of pairs of toand-iro disposed7 track bars to .producetrack-way stretches, the adjacent stretches' beingdisposed atdiverging'angles from end to end oi' said stretches, and connected attheir ends nearest adjacent to each other to constitute a to-'and-rocontinuously inclined track-way tor the travel ot can body carriersthereon;

et, A machine for testing can bodies comprising a track structure iforcan body carriers, including front and rear uprights, and

track bars extending' therebetween and sups i30- end ot the trackwa ibeinoat the too of said structure :1t-one endth'ereof andA thedischarge-end ot" the traclnvaybeing'at the bottom and at the same end ofthestructure, and a Yseries of canbody carriers travelable l5 on saidtrack-Ways.

6. Alcan bodytestercomprising a track vvstructure,including a continuonstrack-Way tor'can body carriers`- formed by end-joined inclinedtrack-Way stretches, lthe receiving '30 -e'nd ofthev track-Way being at'the top of said' structure atfone end thereoic and 'the discharge endlof the treten-Way being," at the lbottom and at the same end ofthestrnctnre, a ser'es ot can body carriers travelable lon saidtrack-Ways, and conveyor means at the latter end `ofthestructure vforelevating'- can body carrier-strom the disclia'rg'e end of saidtrack-Way tothe receiving end thereof.

'T .1A 'can body Atester comprising-a'track structure, includingcontinuons track-Way l'means fori litt-ing the carriers and 'attached'lfor can body carriers formed by endLjo'ined inclined track-Waystretches, the-receiving -cnd-of the traclnWa-y beinglat the top ofsaidstructnreeat-*One end thereof and lthe f 35 discharge end of thetrack-Way-being-atthe bot-tom and atthe same ond of the strnc- "tnre,ine;'hanisms nt" the discharge end of said -tiocl-Wayfto receivel can bodycarriers and can bodies and: foi assembling` sa'id-bodies -on the.carriersvand for evac-tiatin'g'the can `-bo'dies ivhen ,assembled on thecarriers, and

"can-bodics from said'fniechanisms vtoV the re- "ceiving` endfo'lsaid4track-Way.

da cairbody-testino; machinecompris- "ing, in 'combinati-on with aseries otrol'ling emr-carriers andY an inclined track fnlpon V`-Whichsaid cai-Tiers roll, 'ofi mechanism Vto LYasscn'i'ble'the can bodies onwsaidcai't iers and to seal the open ends of theilcan bod-ies,

CII

i'iisinsand` the'otfheradj acont *to* the vreceiving` end of-saidtritclyand 'provided with A'carrier movingandllil n ings.

lO, can bodytcstinp' machine cimipris-` ing, in combination witha--scries ot rollingy can carriers and `an Ainclined track upon whichsaid carriers roll,`ot1 mechanism to as scn'i'ble'the can bodiesonsaid-carriers und to seal the open ends oll the can bodies, `mechanismto vacnnmize the can' bodies when so assembled `and sealed, an 4endless-:elevating conveyor trainedabont 4pnlleys,-one atsaid assembling andvacnnmizing mechanisms und the vother adjacent tothe receiving` end ofsaidtracl-Way and provided with carrier moving andliftinglngs, andupright Yguide bars for said`v carriers 'toY guide them in 'movementWhile en gaggedA `by said lifting ings.

' 1l. A can body testing-'machine compris# ing an extendedl track-Way,a` series ofree can body carriers and Ameans lto cansethem -to-V trA elalong` vsaid tracksivay, combined with mechanism to assemble the canbodies on r'the carriers to project axially and in overhan'ging relationtherefrom and with their-open endssealed bythe carriers, `mechanism tovacnn-mize',the` can bodies when so sealed, andmeans to convey'theassembled carriers rand: can 'bodies Vto the receiving,vend ciV saidtrack-Way.

V12. A ca-n'-bodytestingy machine comprising;- an yextended tradi-Way,4a series of'l iiree can" bo'dy carriers'and means to cansethem Ato`travel `alongsaid "track-Way, `combined with mechanism to vassemble thecan bodies -on thel carriers to-projectaxially and-in overhanging 1rela-tion therefrom and with their ropenfendsse'aled `bythe carriers,mechanism -to vae-numfi-Zethe can bodies"'Whenso sealed,l means to'conveythe assembledv carriers-fand'can bodies to the receiving end ofsaid 'track-Way;andV means near fthe dis- Y1'chargeend 'off saidtrack-Way toremove the canlbodiesltroin said` carriers.

*ik canbody test-ing machine 4comprisv-i ng* an extended tr'aok-Way,` a:series *ot `free canA bodyy cairiersiaiid means to canse `then1 I'totravelfalong 'said trckl'way,- con'ibined 'with -m-eehanismf -toassemblei the can bodies on thc 'carriers to projectaxiallyandin over-Vhz-i-nging" relation therefrom and withy their open-'ends sce-ledbylthecarriers,` mechanism `lo vacnnmizev the can'Y bodies lwhen soisealcd,means -to 'conveythe assembled carriers and an bodies toithe'receix-iingend yot' said trackivfaygalnd can body Vent-inglmeaznsl near' theYidischare end lof `vsaid'- track-Way.

lll. A can body testingmachine,'includ .ing VVVa #series ofv can bodysealing-'f and supporting carriersv`on which canbodies. partially'vacnninized, aref Lheld by externnl a i r -`-pressn`re, comprising Icomb-ined Fcarrien and body assembling means and can body vacul-rmizingmeans, finbracingl a series of co1- lectively aligned andangularly"spaced carrier and can body supports, said assemblingvv mea-nsincluding also a series of plungers severally aligned withV saidsupports, actuating means for said plungers to assemble can bodiesV insealing relation on the earriers, and. an angularly spaced vser'ies ofvacuumizing means operative, When the can liodies are assembled on andsealed against said carriers, to vacuun'iize the can bodies.

15. A canV body testing machine including a series of can bodysealingand supporting carriers on which can bodies, partially vamiumized, areheld by external air pressure, a rotative shaft, spiders spaced alongand fixed to and rotative with said shaft, certain of the spiders havingperipheral, angularly spaced pocketsto receive and hold the carriers andcan bodies in alignment, angular-ly spaced plunger' means carried by oneof said spiders and severally alignedV With the carrier and can bodyspider-pockets, means for actuating the plunger means to 'force the canbodies in sealing relation against` said carriers, and vacuumizing meansoperative, When the can bodies are assembled on and sealed against saidcarriers, to vacuumize the can bodies.

16. A can body testing machine including a series of can body sealingand supporting o'arriers on which can bodies, lpartiallyvacuumized, areheld by external air pressure, comprising meansr for assembling the canbodies on said carriers in sealing relation thereto, said carriers beingprovided With openings through Which the can bodies are vacuumized andvented, spring-closed valves controlling said lvac-uumizing and ventopenings, endivise movable exhaust tubes Vconnected to ay source ofvacuum, and means to torce said tubes toward the carriers to open saidvalves.

17. A can body testing machine -including a can body sealing andV,supporting carrier having a vacuumizing and a vent opening, and onwhich a can body, partially vacuumized, is held by external airpressure, comprising means to assemble the open end of the can bodyendivise against one side of the carrier and. to seal it on saidcarrier, means whereby the can body is vacuumized through saidvacuumizing and vent opening i l 18. A Ycan body testing machineincluding a series of can body sealing and supporting carriers on whichthe can bodies, partially vacuumized, are lheld by external air.pressure, comprising` means to assei'nble the open normally endsfof thecan bodies enduise against and .aal them on one side ot said carriers,said carriers beingprovidcd with Central valvecontrolledvacuumizine' andvent openings, and a series ot angmarlyV spaced, cndwise movable exhausttubes adapted for connecsemble the open ends ot the can bodies againstone side of, and seal them on, said carriers around said openings,endwise movable exhaust tubes adapted for connection to a vacuum andadapted by endwise movementto open the valves ot saidl carriers'andestablish communication of said tubes to the Yinteriors ot the canbodies, a rotative shaft, ported distributingcollar mounted on androtating with said Y' shaft, ivith the Vports thereof angnlarlyv` spacedandiseverally con. nected to said exhaust tubes, and a lixedmeml'ierhaving a single port adapted by rotation of said distributingcollar to be brought successively in communication with the ports ofsaid collar.

20. A can body testing machine comprisin .ea. series ot can body sealingand supporting carriers having valve-controlled vacuumizing and ventopenings, means. to assemble the open ends ofthe can bodies against one.side of, and seal them on, said carriers around said openings, endivisemovable exhaust tubes adapted for connection to a vacuum and adapted'byendvvise movement to open the valves of said carriers and establishcommunication of said tubes to the interiors of the canbodies, arotative shaft,

a ported distributing collar mounted on and rotating With said shaft,with ythe ports thereof angularly spaced and severally connected to saidexhaust tubes, and a fixed member having` a single port adapted by'rotation ot said. distributing collar to be brought successively incommunication with the ports of said'collar.' the ports ot said collarand member opening on flat bearing faces thereof, andineans tospring-hold the ported 'faces otsaid collar and member on each other.

21.111 a can body testing machine, the combination Wit-h a carrierprovided ivith a central vent and vacuun'iizing opening, ot means forassembling `and sealing a can bodyon one side of the carrier around saidopening, a valve to control said vae-uumizing and vent opening, and aslidingly mounted exhaust tube movable toward and trom the other face ofthe carrier for open- Ving said valve and for establishing communicationbetween said tube and the interior 'ofa can body supported and sealed onsaid carrier.

'92. In ui can body testing machine, :t disc- 'like rolling carrierprovided With :t Continuousperipheral groove to engagethemergins of-eiirrier supportingundrguiderraiis oi u. carrier supporting track-Way,and te sealing member on one talee of said carrier.

"23. In u emr body testing machine7 a ported can body eilrrierY faced-onone side with a can body end sealing member having formed therein avcentral valve seat communicating with the eerrierpo't, and a valvecooperat- `fingwith said sent. Y

f 241. ln ay een bodyv testing n'iziehine7 portA i' ed can bodycarrierfziced on ene sidewvith la` can body end vseaiiing 'inemben aCent-rid seat on -suid side communicatingV'With the vCurrier port7 and avulve to Close on said seat and having an actuating stem projecting'through said port and beyondl the side of the carrier oppositesaidfseehng member.

` 25. `In a. can bodytesting machine, n een body carrier having onione'uce t yielding can body end sealingy dise :nid centrally thereoilwith a yielding valve seat, rand a va veengaging said valve seat.

26. 'In a can body ltesting machine,` :t een body carrier having on fone'face a'yieiding can body end sealing" dise ard centrally thereoiiivithny yielding vulve sent, a` spring'- heid valve en' ;a`gi ngV said ksent,lundk means whereby 'said valve may be `opened: against the-action ofthe sealing spring of sind valve.

"12T-fn a' can fbody ytesting machine,V a enrrier -pro\fided `Withzi-Hcentrai Lveen-ninizing und 4vent ropenrngf'zi'ican body sealing diseonrone face' off the carrier through vwhich wsaid opening :exten-ds7V u.spring-'closed vvalve engaging fr'seation said seal-ing dise tocontnolsnid opening and providedwith Metern extendingoutwardly throughund beyond theother'face o'f'suid eurrierrzmd adapted :for Contact,beyond the hitter face of the eurrier,` Withu vulve opening device.

2S. Inn. can body testingf machine, n Carrier=provided With; n centralvaounmizing and yentPo-pening', a can bodyseuhngdise Von one face Aoithe carrier'tnoughu'hieh said opening"extends,l itspring-eiosed Valveengaging @sont on said sealing disotofeontrolsaidopening and` providedWith a lstem vextending `outwardly through #und lbeyond the lother faceof said f carrierv 'and kzuhipted vfor Contact, beyondv the hitterfaceof the Currier, ivith a vsi'lvefopeni-ng device,l said carrierbeing"providedwith a. continuous peripherai groovetoerengage the marginSof u carrier-supper-ting traeinway.

'29. In a can body testing machine, e dise like rolling Carrier having@n rperipherai tread surface `-for su-pportingthe y'same in

